Holy lord, 8GB of GDDR5? Why would that ever be necessary in a laptop?
I guess the way I'd look at it is since the video card can't be upgraded/replaced, go for as much ram as you can get.
In high-end gaming laptops you can upgrade your graphics card. This includes MSI, Alienware and Clevo/Sager designs.The reason behind the 8GBs is marketing. PS4 came with 8GBs and people made a fuzz about it, nVidia tries to get people into PC and is playing like Samsung now: Bigger is better or at least match them in numbers.Any true need? No. Just 8 feels like a magic number nowadays... Oh and to "cover up" that this is just another refresh. ~10% performance increase from 7xxM series.